Nttt lock



Aug. 5, 1929. v R. L. ADAMS Re. 17,396

NUT LOCK Original Filed Aug. 1.8, 1928 INVENTOR u M5010! KM I a 2 man/ 1in highest degree.

Reissued Aug. 6, 192 9.

P rsnT OFFICE.

L. ADAMS, 0F AVALON, IENNSYLVANIA. y

NUT LOCK. V

vOriginal 1T0. 1,715,883, dated June 4, 1929. Serial No. 300,543, filedAugust 15, 1928. Application for reissue filed June 18, 1929. SerialNoj. 871,878.

My invention relates to improvements in I nut locks. The objects in vieware simplicity and cheapness, facility [of application, adequacy inservice, and removabil-ity, comb ned In the accompanying drawings, Fig.I a view in section of the nut lock in service;

Fig. II is a view inlan from above of the nut] lock itself, detache fromassociate parts, and 10 in Fig. II the plane of section of Fig. I 1s1ndicated by the line I-I. Fig III is a view in section, on the planeindicated at III- 1H,

Fig. II. IV is a view in plan from be-.

' neath of a nut lock which, with modification in detail, embodies theinvention; and Flg. V

" is a view in section, on the plane indicated at v. v, ri Iv.

The invention is found in a washer of particular and peculiar form,adapted to be mtroduced in the position in which washers ordinarily areintroduced, encircling the bolt,

and engaged by the nethersurface of the nut, and clamped by thetightening of the nut between the nut and an opposite surface.

The washer of the invention is an annulus 1 of elastic metal, preferablyof somewhat greater interior diameter than the diameter of the bolt witwhich it is to be used. On its nether face i is provided with meansbywhich it engages the surface upon which it is. applied, in anengagement. which resists transverse strain in every direction. Tothisend, the nether face of the washer may be I serrated, as indicatdat.2 in Figs, I and III.

The serrations may be formed in the punching operation by which thewasher maybe shaped from a sheet of material. They are circular,concentric with the washer, .and

- preferably, as shown, the outer wallof each A serration isperpendicular to the-plane of the 1 surface of the washer, while theinner wall is inclined, and the edges of the serrations are sharp.

', Alternatively, the washer maybe provided fecting engagement betweenthe washer andv thebody against which in service itis clamped,

may manifestly be made; and other particular shapes for the serrationsor other interruptions of surface continuity may be employed, to effectthe slip-resistant engagement involved in the practice of my invention.It will, however, be remarked of the washer in both of the two formsshown, that when clamped to place, it is in effect itegral with the bodyupon which it is clamped, in this sense; that it is immovable upon thatbody transversely in every direction.

Two opposite and circumferentially extending tongues 4 are formed,conveniently they are cut from the substance of the washer and bentaside, so that their tips rise normal- 1y above the plane of the uppersurface of the Washer, as clearly appears in Figs. III

and V. The characteristics of the tongues' are that,'being of onesubstance with, they spring from the body of the washer; they extendlongitudinally in circumferential direction; they are free at theirends, and prefer-- ably they are severed from the body of the washer bycuts'5 of appreciable width, so that they have some free play intransverse direction; they protrude from the upper surface of thewasher; they are preferably toothed at the end,fwith a sloping face topermit tightening of the nutand a vertical face to resist loosening ofthe nut (cf. I) thereare two of them, oppositely placed andsymmetrically arranged.

As shown in the drawings, the circumfer- I initial extent of eachtongue" is through a quadrant of the annulus. These qua rant portions ofthe annulus are preferablyless in thickness than the complementaryportions. VThe upper face of the annulus is over these portionscountersunk, as indicated at 6,;and the nether face also may besimilarly counter sunk, as indicated, at 7 If the nether face he thuscountersunk, the means described above for engagement with the surfaceof a body to which application is made, will ordinarily be confined tothe complementary quadrants of the annulus. The upper surface is thuscountersunk, to the end that instruments, maybe thrust beneath the nutwhen the lock is' in service, to bend the I tongues aside and effectrelease of the nut."

The nether surface of the washer may be countersunk, to allow thetongues to yield more easily as the nut is tightened, and so tofacilitateassembly.

In making application of the nut lock of my invention, the bolt holeshould be formed somewhat larger than the bolt, as is indicated in Fig.I, and provision should be made, as by pin and groove connectionindicated at 8, to hold the bolt secureagainstturning. When the bolt hasbeen brought to place, the annulus is applied, in the position indicatedin Fig. I, concentric with the bolt hole. The nut then is applied to thebolt and screwed down in the usual manner. The nut as it is tightenedsecures the washer upon the surface of the body upon which the boltingstrain is exerted, against lateral displacement, and the,

tongues gradually carried by compression into the spaces from which theynormally protrude, engage by their tips the nut, in

such manner as to permit the continued turning of the nut in directionto tighten it, but to resist turning in opposite direction.

In service the tips of the'two tongues serve as fulcrum points, to theend that tendencies to transverse -movement of the nut, which otherwisemight cause the nut to creep upon the threads of the bolt and to becomeloose are by the presence of one of the tongues or the other resolvedinto two components, of which one is by the tongue itself met and When abolt is to be released, instruments areintroduced beneath the nut whichforce the tongues aside and efiect disengagement. The nut may then beremoved with ease.

I claim as my invention:

A nut lock consisting of an annulus ofelastic metal with two oppositequadrants of greater'and two of less thickness and pro vided with twotongues .slit from its sub stance within the two quadrant portions ofless thickness and bent aside, the tongues being oppositely arranged,integral at their roots with the body of the annulus circumferentiallyextending, and free at their tips, and the nether face of the annuluswithin the quadrants of greater thickness being provided with means foruniting the annulus when under compression, integrally with an-[ otherbody.

In witness whereof, I hereunto set In RICHARD L, AD MS.

hand.

